Metal-bound curbing.



PATENTED MAY 5, 1903.

H. H. WAINWRIGHT.

METAL BOUND OURBING.

APPLICATION FILED MAR. s. 1900.

N0 MODEL.

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ATENT METAL BOUND CURBING.

SPECIFICATION forming part of Letters Patent N 0. 727,233, dated May 5, 1903. Application filed March 8, 1900. Serial No. 7,779. (No model-) To all whom it mag concern:

Be it known that LHENRY H. WAINWRIGHT, a citizen of the United States of America, and a resident of the city of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Metal-Bound Curbing, of which the following is a specification.

My invention relates to improvements in metal-bound curbing and similar Work.

The invention relates to improvements in the combination of concrete curbing anda metal bar which protects the exposed corner or corners of the mass or block of concrete; and it is the purpose of the invention to provide a self-contained barthat is, a bar which has the devices for anchoring it in the concrete formed integral with or inseparably secured to the barso as to obviate the necessity of framework, brackets, and the like for holding and anchoring the said bar in the concrete, as well during as after the construction of the concrete work. Such a self-contained corner-bar with integral anchorage is of great value and utility, for it greatly reduces the cost of producing metal-bound concrete curbwork by dispensing with much weight of metal in the corner protection andby reducing the amount of labor required in the construction, as well as by permitting unskilled labor to be employed.

The curbing produced by this invention is also superior to any other with which I am acquainted in that it insures the secure em-. bedding and retaining of the metal bar in the.

concrete curb, even in the conditions of use of such curbing where the bar is constantly exposed to violent shock from wheels of passing vehicles.

Referring to the drawings which accompany the specification, Figure l is a cross-section of concrete curbing containing my improved metal corner-bar. the corner-bar on a larger scale. Fig. 3 is a cross-section of a corner-bar which is generally similar in shape to that shown in Fig. 2, but having an enlarged dovetail or anchorage.

Fig. 2 is a cross-section of Referring to Figs. 1 and 2, the said bar A, which is preferably made of rolled steel and with or without galvanizing, is formed, as shown in the cross-section, with a solid head a and a web I), which projects backwardly on the axial line of said head a and in such a direction that it is in substantially the plane of the shocks which are received by the head a from the wheels of passing vehicles. Said web 12 extends the length of the head a, and said head and web are united by obtuse-angled somewhat-concaved lines, as shown in the drawings. The inner end of said web I) is provided with a longitudinal dovetail anchorage c, which extends the length of said web 1) and greatly aids in locking the bar A firmly into the concrete.

In Fig. 3 the head a and Web b of the bar A are of similar shape and arrangement to the corresponding parts shown in Fig. 2; but

. the web I) is now provided with a wider anchor age f, assuming the form of a broad flanged dovetail, as shown in Fig. 3.

In constructing the curbing the bar A is placed in position in the concrete before the concrete has set, the web I), with its anchor age, being forcedinto the yielding concrete. The concrete is then built upto the proper height behind the corner-bar and is tam-ped and packed firmly against the inner and under side of the head and against the sides of the Web, the open obtuse-angled lines at the junction of the head and Web making it possible to firmly tamp and pack the concrete against the web and head.

Now, having described my improvement, I claim as my invention-- 1. The combination in curbing, of a mass of concrete shaped to the face of the curb and a metal corner-bar therefor inserted in said mass of concrete and havinga head positioned at the corner of said mass, an integral web extending longitudinally of saidv head and backwardly on the axial plane of said head and connected with the sides of said head by obtusely-angled lines, and an integral longi tudinal dovetail along the inner edge of said Web, whereby said corner-bar is interlocked integral longitudinal dovetail c on the inner 10 with said mass of concrete, substantially as edge of said Web I) for interlocking with the described. concrete, substantially as described.

2. A protector for the corner of concrete Signed at Philadelphia this 6th day of 5 curbing consisting of a metal corner-bar hav- March, 1900.

ing a head a, a longitudinal integral web I) HENRY H. WVAINWRIGHT. projecting back from said head a, on the axial Witnesses: plane thereof and connected with the sides E. V. M. BRENNAN,

of said head by obtusely-angled lines, and an JNO. I-I. SCOTT. 

